Two boys A and B start at the same time to ride from Port Jervis to Poughkeepsie, 60 miles away. A travels 4 miles an hour slower than B. B reaches Poughkeepsie and at once turns back meeting A12 miles from Poughkeepsie. The rate of A was:<spanclass=′latex−bold′>(A)</span>4 mph<spanclass=′latex−bold′>(B)</span>8 mph<spanclass=′latex−bold′>(C)</span>12 mph<spanclass=′latex−bold′>(D)</span>16 mph<spanclass=′latex−bold′>(E)</span>20 mph